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In this exploratory lattice study, low-energy scattering of the (DD * ) ± meson system is analyzed using lattice QCD with N f = 2 twisted mass fermion configurations with three pion mass values. The calculation is performed within single-channel Lüscher's finite-size formalism. The threshold scattering parameters, namely the scattering length a0 and the effective range r0, for the s-wave scattering in J P = 1 + channel are extracted. For the cases in our study, the interaction between the two charmed mesons is weakly repulsive. Our lattice results therefore do not support the possibility of a shallow bound state for the two mesons for the pion mass values we studied. This calculation provides some useful information on the nature of the newly discovered resonance-like structure Zc(3900) by various experimental groups.

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